boulevard in the richmond district. you are on the road, which is this piece of land. after the 1906 earthquake and fire, there were a refugee camps for and in a lot of the refugee camps, there were earthquake refugee cottages. these were small little portable cottages built on these camps, and the idea was you could live there, and when the camps closed after a bad year, you could take it away to an empty lot. >> you had to buy it. >> you could, but your rent would go towards the purchase price. by the end, they just wanted to get rid of them. >> in 1930, all of these were declared a substandard structures and the city wanted them all destroyed because they were blights. >> but there still are many. how many are left? >> there is at least 30. >> out of 5610 built. >> yes, sir.